openvswitch: Constify various function arguments

Help produce better optimized code.

Signed-off-by: Thomas Graf <tgraf@noironetworks.com>
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>

diff --cc net/openvswitch/actions.c
Simple merge

diff --cc net/openvswitch/datapath.c
Simple merge

diff --cc net/openvswitch/datapath.h
Simple merge

diff --cc net/openvswitch/flow.c
Simple merge

diff --cc net/openvswitch/flow.h
Simple merge

diff --cc net/openvswitch/flow_table.c
Simple merge

diff --cc net/openvswitch/flow_table.h
Simple merge

diff --cc net/openvswitch/vport-geneve.c
Simple merge

diff --cc net/openvswitch/vport-netdev.c
Simple merge

diff --cc net/openvswitch/vport.c
Simple merge

diff --cc net/openvswitch/vport.h
Simple merge